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1 | /* |
2 | * Copyright (c) 2004 Topspin Corporation. All rights reserved. |
3 | * |
4 | * This software is available to you under a choice of one of two |
5 | * licenses. You may choose to be licensed under the terms of the GNU |
6 | * General Public License (GPL) Version 2, available from the file |
7 | * COPYING in the main directory of this source tree, or the |
8 | * OpenIB.org BSD license below: |
9 | * |
10 | * Redistribution and use in source and binary forms, with or |
11 | * without modification, are permitted provided that the following |
12 | * conditions are met: |
13 | * |
14 | * - Redistributions of source code must retain the above |
15 | * copyright notice, this list of conditions and the following |
16 | * disclaimer. |
17 | * |
18 | * - Redistributions in binary form must reproduce the above |
19 | * copyright notice, this list of conditions and the following |
20 | * disclaimer in the documentation and/or other materials |
21 | * provided with the distribution. |
22 | * |
23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
30 | * SOFTWARE. |
31 | */ |
32 | |
33 | #ifndef IB_PACK_H |
34 | #define IB_PACK_H |
35 | |
36 | #include <rdma/ib_verbs.h> |
37 | |
38 | enum { |
39 | IB_LRH_BYTES = 8, |
40 | IB_GRH_BYTES = 40, |
41 | IB_BTH_BYTES = 12, |
42 | IB_DETH_BYTES = 8 |
43 | }; |
44 | |
45 | struct ib_field { |
46 | size_t struct_offset_bytes; |
47 | size_t struct_size_bytes; |
48 | int offset_words; |
49 | int offset_bits; |
50 | int size_bits; |
51 | char *field_name; |
52 | }; |
53 | |
54 | #define RESERVED \ |
55 | .field_name = "reserved" |
56 | |
57 | /* |
58 | * This macro cleans up the definitions of constants for BTH opcodes. |
59 | * It is used to define constants such as IB_OPCODE_UD_SEND_ONLY, |
60 | * which becomes IB_OPCODE_UD + IB_OPCODE_SEND_ONLY, and this gives |
61 | * the correct value. |
62 | * |
63 | * In short, user code should use the constants defined using the |
64 | * macro rather than worrying about adding together other constants. |
65 | */ |
66 | #define IB_OPCODE(transport, op) \ |
67 | IB_OPCODE_ ## transport ## _ ## op = \ |
68 | IB_OPCODE_ ## transport + IB_OPCODE_ ## op |
69 | |
70 | enum { |
71 | /* transport types -- just used to define real constants */ |
72 | IB_OPCODE_RC = 0x00, |
73 | IB_OPCODE_UC = 0x20, |
74 | IB_OPCODE_RD = 0x40, |
75 | IB_OPCODE_UD = 0x60, |
76 | |
77 | /* operations -- just used to define real constants */ |
78 | IB_OPCODE_SEND_FIRST = 0x00, |
79 | IB_OPCODE_SEND_MIDDLE = 0x01, |
80 | IB_OPCODE_SEND_LAST = 0x02, |
81 | IB_OPCODE_SEND_LAST_WITH_IMMEDIATE = 0x03, |
82 | IB_OPCODE_SEND_ONLY = 0x04, |
83 | IB_OPCODE_SEND_ONLY_WITH_IMMEDIATE = 0x05, |
84 | IB_OPCODE_RDMA_WRITE_FIRST = 0x06, |
85 | IB_OPCODE_RDMA_WRITE_MIDDLE = 0x07, |
86 | IB_OPCODE_RDMA_WRITE_LAST = 0x08, |
87 | IB_OPCODE_RDMA_WRITE_LAST_WITH_IMMEDIATE = 0x09, |
88 | IB_OPCODE_RDMA_WRITE_ONLY = 0x0a, |
89 | IB_OPCODE_RDMA_WRITE_ONLY_WITH_IMMEDIATE = 0x0b, |
90 | IB_OPCODE_RDMA_READ_REQUEST = 0x0c, |
91 | IB_OPCODE_RDMA_READ_RESPONSE_FIRST = 0x0d, |
92 | IB_OPCODE_RDMA_READ_RESPONSE_MIDDLE = 0x0e, |
93 | IB_OPCODE_RDMA_READ_RESPONSE_LAST = 0x0f, |
94 | IB_OPCODE_RDMA_READ_RESPONSE_ONLY = 0x10, |
95 | IB_OPCODE_ACKNOWLEDGE = 0x11, |
96 | IB_OPCODE_ATOMIC_ACKNOWLEDGE = 0x12, |
97 | IB_OPCODE_COMPARE_SWAP = 0x13, |
98 | IB_OPCODE_FETCH_ADD = 0x14, |
99 | |
100 | /* real constants follow -- see comment about above IB_OPCODE() |
101 | macro for more details */ |
102 | |
103 | /* RC */ |
104 | IB_OPCODE(RC, SEND_FIRST), |
105 | IB_OPCODE(RC, SEND_MIDDLE), |
106 | IB_OPCODE(RC, SEND_LAST), |
107 | IB_OPCODE(RC, SEND_LAST_WITH_IMMEDIATE), |
108 | IB_OPCODE(RC, SEND_ONLY), |
109 | IB_OPCODE(RC, SEND_ONLY_WITH_IMMEDIATE), |
110 | IB_OPCODE(RC, RDMA_WRITE_FIRST), |
111 | IB_OPCODE(RC, RDMA_WRITE_MIDDLE), |
112 | IB_OPCODE(RC, RDMA_WRITE_LAST), |
113 | IB_OPCODE(RC, RDMA_WRITE_LAST_WITH_IMMEDIATE), |
114 | IB_OPCODE(RC, RDMA_WRITE_ONLY), |
115 | IB_OPCODE(RC, RDMA_WRITE_ONLY_WITH_IMMEDIATE), |
116 | IB_OPCODE(RC, RDMA_READ_REQUEST), |
117 | IB_OPCODE(RC, RDMA_READ_RESPONSE_FIRST), |
118 | IB_OPCODE(RC, RDMA_READ_RESPONSE_MIDDLE), |
119 | IB_OPCODE(RC, RDMA_READ_RESPONSE_LAST), |
120 | IB_OPCODE(RC, RDMA_READ_RESPONSE_ONLY), |
121 | IB_OPCODE(RC, ACKNOWLEDGE), |
122 | IB_OPCODE(RC, ATOMIC_ACKNOWLEDGE), |
123 | IB_OPCODE(RC, COMPARE_SWAP), |
124 | IB_OPCODE(RC, FETCH_ADD), |
125 | |
126 | /* UC */ |
127 | IB_OPCODE(UC, SEND_FIRST), |
128 | IB_OPCODE(UC, SEND_MIDDLE), |
129 | IB_OPCODE(UC, SEND_LAST), |
130 | IB_OPCODE(UC, SEND_LAST_WITH_IMMEDIATE), |
131 | IB_OPCODE(UC, SEND_ONLY), |
132 | IB_OPCODE(UC, SEND_ONLY_WITH_IMMEDIATE), |
133 | IB_OPCODE(UC, RDMA_WRITE_FIRST), |
134 | IB_OPCODE(UC, RDMA_WRITE_MIDDLE), |
135 | IB_OPCODE(UC, RDMA_WRITE_LAST), |
136 | IB_OPCODE(UC, RDMA_WRITE_LAST_WITH_IMMEDIATE), |
137 | IB_OPCODE(UC, RDMA_WRITE_ONLY), |
138 | IB_OPCODE(UC, RDMA_WRITE_ONLY_WITH_IMMEDIATE), |
139 | |
140 | /* RD */ |
141 | IB_OPCODE(RD, SEND_FIRST), |
142 | IB_OPCODE(RD, SEND_MIDDLE), |
143 | IB_OPCODE(RD, SEND_LAST), |
144 | IB_OPCODE(RD, SEND_LAST_WITH_IMMEDIATE), |
145 | IB_OPCODE(RD, SEND_ONLY), |
146 | IB_OPCODE(RD, SEND_ONLY_WITH_IMMEDIATE), |
147 | IB_OPCODE(RD, RDMA_WRITE_FIRST), |
148 | IB_OPCODE(RD, RDMA_WRITE_MIDDLE), |
149 | IB_OPCODE(RD, RDMA_WRITE_LAST), |
150 | IB_OPCODE(RD, RDMA_WRITE_LAST_WITH_IMMEDIATE), |
151 | IB_OPCODE(RD, RDMA_WRITE_ONLY), |
152 | IB_OPCODE(RD, RDMA_WRITE_ONLY_WITH_IMMEDIATE), |
153 | IB_OPCODE(RD, RDMA_READ_REQUEST), |
154 | IB_OPCODE(RD, RDMA_READ_RESPONSE_FIRST), |
155 | IB_OPCODE(RD, RDMA_READ_RESPONSE_MIDDLE), |
156 | IB_OPCODE(RD, RDMA_READ_RESPONSE_LAST), |
157 | IB_OPCODE(RD, RDMA_READ_RESPONSE_ONLY), |
158 | IB_OPCODE(RD, ACKNOWLEDGE), |
159 | IB_OPCODE(RD, ATOMIC_ACKNOWLEDGE), |
160 | IB_OPCODE(RD, COMPARE_SWAP), |
161 | IB_OPCODE(RD, FETCH_ADD), |
162 | |
163 | /* UD */ |
164 | IB_OPCODE(UD, SEND_ONLY), |
165 | IB_OPCODE(UD, SEND_ONLY_WITH_IMMEDIATE) |
166 | }; |
167 | |
168 | enum { |
169 | IB_LNH_RAW = 0, |
170 | IB_LNH_IP = 1, |
171 | IB_LNH_IBA_LOCAL = 2, |
172 | IB_LNH_IBA_GLOBAL = 3 |
173 | }; |
174 | |
175 | struct ib_unpacked_lrh { |
176 | u8 virtual_lane; |
177 | u8 link_version; |
178 | u8 service_level; |
179 | u8 link_next_header; |
180 | __be16 destination_lid; |
181 | __be16 packet_length; |
182 | __be16 source_lid; |
183 | }; |
184 | |
185 | struct ib_unpacked_grh { |
186 | u8 ip_version; |
187 | u8 traffic_class; |
188 | __be32 flow_label; |
189 | __be16 payload_length; |
190 | u8 next_header; |
191 | u8 hop_limit; |
192 | union ib_gid source_gid; |
193 | union ib_gid destination_gid; |
194 | }; |
195 | |
196 | struct ib_unpacked_bth { |
197 | u8 opcode; |
198 | u8 solicited_event; |
199 | u8 mig_req; |
200 | u8 pad_count; |
201 | u8 transport_header_version; |
202 | __be16 pkey; |
203 | __be32 destination_qpn; |
204 | u8 ack_req; |
205 | __be32 psn; |
206 | }; |
207 | |
208 | struct ib_unpacked_deth { |
209 | __be32 qkey; |
210 | __be32 source_qpn; |
211 | }; |
212 | |
213 | struct ib_ud_header { |
214 | struct ib_unpacked_lrh lrh; |
215 | int grh_present; |
216 | struct ib_unpacked_grh grh; |
217 | struct ib_unpacked_bth bth; |
218 | struct ib_unpacked_deth deth; |
219 | int immediate_present; |
220 | __be32 immediate_data; |
221 | }; |
222 | |
223 | void ib_pack(const struct ib_field *desc, |
224 | int desc_len, |
225 | void *structure, |
226 | void *buf); |
227 | |
228 | void ib_unpack(const struct ib_field *desc, |
229 | int desc_len, |
230 | void *buf, |
231 | void *structure); |
232 | |
233 | void ib_ud_header_init(int payload_bytes, |
234 | int grh_present, |
235 | struct ib_ud_header *header); |
236 | |
237 | int ib_ud_header_pack(struct ib_ud_header *header, |
238 | void *buf); |
239 | |
240 | int ib_ud_header_unpack(void *buf, |
241 | struct ib_ud_header *header); |
242 | |
243 | #endif /* IB_PACK_H */ |
244 |
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